Cars can and do work in all temperatures.
However if the temperature is very, very cold such as -30 or below it may be hard for the engine to crank over and start and the oil can be slow to move around.
If the weather is really hot then the engine may not cool as good but even then the car will still operate.
As long as your engine temperature gauge does not get into the danger zone reading then the car will be safe.
However if the temperature gauge continues rising and does not come down then your engine is likely overheating which could be caused by a bad head gasket, coolant leak, clogged radiator, bad radiator hoses or even a bad water pump.
The engine is overheated when it reaches a temperature of 231 degrees.
Damage may occur if the temperature is above 245 degrees Fahrenheit.
Why Do Engines Overheat?
Engines can overheat for many reasons.
In general, it's because something's wrong within the cooling system and heat isn't able to escape the engine compartment.
The source of the issue could include a cooling system leak, faulty radiator fan, broken water pump, or clogged coolant hose.